nosql overview

[51CTO external headlines] We once discussed "What role does NoSQL play in our work ?" We have also raised 101 questions about how to choose a NoSQL database. We even held an online seminar to thoroughly analyze what SQL, NoSQL, or applications can bring to the scalability of Web applications. [51CTO external headlines] We once discussed "What role does

First, the concept of SQL (structured Query Language) database, refers to the relational database.　　Main representative: SQL Server,oracle,mysql (open source), PostgreSQL (open source). NoSQL (not only SQL) refers to a non-relational database.Main representative: MONGODB,REDIS,COUCHDB. Second, the difference1. Storage modeSQL data exists in a structure-specific table, and NoSQL is more flexible and extensib

Tags: style blog http java using OS IO strongUsing Oracle Berkeley DB as a NoSQL data storeShashank TiwariReleased February 2011"NoSQL" is a new buzzword among developers, architects, and even technology managers. Although the term has recently been popular, it is surprising that it does not have a universally accepted definition.Typically, any database that is non-RDBMS and follows a modeless structure gen

write performance, and it also supports the Hashtable of relational database table structure and simple condition, paging and sorting operations, which is a very good NoSQL database.The main disadvantage of TC is that, after the amount of data reaches the billion level, the concurrent write data performance will be greatly reduced, the developer found in the TC inserted 160 million 2KB~20KB data, write performance began to drop sharply. That is, when

Kristóf Kovács, a software architect and consultant, recently released an article comparing various types of NoSQL databases. Although the SQL database is a very useful tool, the monopoly is about to be broken after a 15-year solo show. It was only a matter of time: forced to use relational databases, but found that the inability to adapt to demand was too numerous. But the differences between the NoSQL d

Tags: memcached NoSQL21.1 NoSQL Introduction• What is NoSQL• Non-relational databases are NoSQL, relational databases represent MySQLFor relational databases, it is necessary to store the data in libraries, tables, rows, fields, query the time according to the conditions of a line to match, when the equivalent is very large time and resources, especially the data

handles plus stdin, stdout, stderr, and so on is 20. Although a mixed-record structure is appropriate for non-relational or NoSQL APIs, because there is no pattern required, developers often face situations where a technique is needed to use a pattern. A consistent pattern definition for some software using SQL (or ODBC, etc.) is required, such as a large number of third-party reporting and analysis tools, including Crystal Reports and Excel, as wel

Label:About NoSQL1.1 System-to-data requirementsNosql[nosql main use Big data processing] all called "Not only SQL", for non-relational database [non-relational database is a relational database all features are not, the primary foreign key, constraints are not, SQL statements are not. ]。 The main features of this type of database are:Non-relational, distributed, open-source, horizontally scalable. The most typical application for

 NoSQL (NoSQL = not-only SQL), meaning "not just SQL"is a new revolutionary movement in the database, which was raised early on, and the trend is growing to 2009. NoSQL advocates are advocating the use of non-relational data storage, which is undoubtedly a new kind of thinking injection, relative to the overwhelming use of relational databases.

Label:Although SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a matter of time: forced to use relational databases, but eventually found to be unable to adapt to the needs of the numerous. But the difference between NoSQL databases is far more than two of the differences between SQL databases. This means that the Software architect should choose a suitable

. Relational databases create more problems when dealing with these trends. This leads to the emergence of a large number of different techniques to address specific aspects of these problems, which can interact with or replace existing RDBMS-also known as hybrid persistence (Polyglot persistence). Database substitutes are not new, they have been in the form of object Databases (OODBMS), hierarchical databases (such as LDAP) for a long time. However, over the past few years, a number of new

This article by Bole Online-Tang Yuhua translation from Kristóf Kovács. Welcome to the technical translation team. Please refer to the requirements at the end of this article for reprint. Guide: Kristóf Kovács is a software architect and consultant who recently published an article comparing various types of NoSQL databases. Although SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a

MaxIndelicato has published an article titled NoSQLontheMicrosoftPlatform from queryable distributed solutions, such as MongoDB, to simple distributed KeyValue storage solutions, such as Cassandra. In addition, there are Riak, TokyoCabinet, Voldemort, CouchDB and Redis. However, currently only a small number of NoSQL projects are supported. Max Indelicato has published an article titled NoSQL on the Microso

has been greatly weakened.Therefore, the relational database is less suitable in these more and more application scenarios, and the non-relational database to solve this kind of problem arises . NoSQL is a generalized definition of non-relational data storage. It breaks the unification of long-term relational database and acid theory . NoSQL data storage does not require a fixed table structure (for exampl

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Will DBAs still exist in the NoSQL world? Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs Gartner, a consulting firm, published a survey earlier this month targeting adoption of NoSQL in various positions. The results are surprising. : Only 5.5% of DBAs use NoSQL. The reason is not clear yet, and the investigation itself may be

Krist ófskács, a software architect and consultant who once worked in a number of major companies, blogs on mainstream NoSQL databases (Cassandra, Mongodb, CouchDB, Redis, Riak, Membase, Neo4j, and HBase)) A comprehensive comparison was conducted. Although SQL database is a very useful tool, after 15 years of outstanding performance, the monopoly will be broken. This is only a matter of time: I was forced to use relational databases, but I finally fou

Redis database of NoSQL Database: Redis introduction and installation and deployment, nosqlredisZookeeper NoSQL (NoSQL = Not Only SQL) refers to non-relational databases. With the rise of Internet Web websites, traditional relational databases are dealing with Web websites, especially ultra-large-scale and high-concurrency SNS type web pure dynamic websites, many

This article was translated from distributed algorithms in NoSQL DatabasesThe scalability of the system is the main reason for the development of the NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket, and everything can be plugged in. Although the

Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to a deluge of research and practice on protocols and algorithms. In this article, I will make some systematic descriptions of the distributed features of the NoSQL database. The scalability of the system is the main reason to drive the development of the